JP5506579B2 - Air conditioner indoor unit - Google Patents

Description

  The present invention relates to an indoor unit of an air conditioner, and particularly to a wind direction control mechanism.

  As a wind direction control mechanism installed in an indoor unit of a conventional air conditioner, after the motor drive is finished, by driving a certain amount in the direction opposite to the drive direction, until the flap is activated when the drive direction is opposite There is one that eliminates the time lag and accurately sets the wind direction without deviation due to play (see, for example, Patent Document 1). In order to smoothly perform such wind direction control, a play called backlash is required between the components inside the gear.

JP 2006-180648 A (page 3, FIG. 1)

  However, in the air conditioner according to Patent Document 1, when the holding torque of the motor is small, when the wind pressure of the fluid blown out from the outlet that the flap receives is larger than the holding torque existing in the play portion of the gear, There was a problem that the wind direction changed even though the flaps were rotated by the amount and the wind direction change setting was not performed.

  The present invention has been made to solve the above-described problems, and can fix the flap even if it receives wind pressure from the wind blown out from the indoor unit of the air conditioner, so that the accurate wind direction can be obtained. It aims at obtaining the indoor unit of the air conditioner which can implement control.

An indoor unit of an air conditioner according to the present invention includes a motor, a flap that changes a wind direction of a blowout wind that is blown from the indoor unit, and a transmission mechanism that transmits a rotational operation of the motor as a rotational operation of the flap. And a control unit that controls a flap direction that is a blade direction of the flap by performing rotation control of the motor, and the control unit performs the positioning operation in a specific flap direction. When there is play in the rotational direction in which the flap receives force from the blowing air due to the backlash of the transmission mechanism unit, a backlash control operation is performed to eliminate the play , and the flap is in front. During the positioning operation in which it is positioned by rotating from the position on the left side to the right side from the front or when the flap is To when the rotational positioning operation which is positioned from the state of being located on the right side to the left side of the front, which comprises carrying out the backlash control operation.

  According to the present invention, by performing the backlash control operation during the flap positioning operation, the amount of play caused by the backlash included in the transmission mechanism of the driving force from the motor to the flap by the force of the wind blown from the air conditioner. Since the flap can only be prevented from rotating, an indoor unit of an air conditioner capable of performing accurate wind direction setting can be obtained.

It is a sectional side view of the indoor unit 1 of the air conditioner according to Embodiment 1 of the present invention. It is the block diagram which showed typically the wind direction control mechanism of the indoor unit 1 of the air conditioner which concerns on Embodiment 1 of this invention. It is the block diagram which expanded and showed typically the flap 104 connected with the arm 103 of the indoor unit 1 of the air conditioner which concerns on Embodiment 1 of this invention. It is a figure which shows the direction of the flap 104 in the indoor unit 1 of the air conditioner which concerns on Embodiment 1 of this invention. The operation | movement of all the patterns in the case of performing positioning operation | movement from each direction of the direction (1) -direction (6) of the flap 104 in another direction in the indoor unit 1 of the air conditioner concerning Embodiment 1 of this invention is shown. FIG. It is a figure which shows the example of the bitmap for determining whether backlash control operation is implemented in the indoor unit 1 of the air conditioner which concerns on Embodiment 1 of this invention. It is a block diagram of another form which expanded and showed typically the flap 104 connected with the arm 103 of the indoor unit 1 of the air conditioner which concerns on Embodiment 1 of this invention.

Embodiment 1 FIG.
(Configuration of indoor unit 1 of air conditioner)
FIG. 1 is a side sectional view of an indoor unit 1 of an air conditioner according to Embodiment 1 of the present invention.
As shown in FIG. 1, the indoor unit 1 of the air conditioner according to the present embodiment includes at least a suction port 2 through which air is sent into the indoor unit 1, and air and refrigeration fed from the suction port 2. The heat exchanger 3 that performs heat exchange with the refrigerant of the cycle, the blower fan 4 that sends out the air heat-exchanged by the heat exchanger 3, and the air exchanged by the blower fan 4 sends the heat-exchanged air to the outside. And an up-and-down air direction flap 6 that controls the up-and-down air direction of the blown-out air. Further, a flap 104 (which will be described later in FIG. 2) for controlling the wind direction in the left-right direction of the blown-out air is provided in the blowout port 5 on the inner side of the indoor unit 1 with respect to the up-down wind direction flap 6.

  An outline of the operation of the indoor unit 1 configured as described above will be described. As the blower fan 4 rotates, air is sucked into the indoor unit 1 from the suction port 2. The sucked air is heat-exchanged by the heat exchanger 3, and the air is cooled during the cooling operation, while the air is heated during the heating operation. Then, the air that has undergone heat exchange by the heat exchanger 3 is blown out from the blowout port 5. At this time, the vertical wind direction of the blown air is controlled by the vertical wind direction flap 6, and the horizontal wind direction is controlled by the flap 104.

Note that the configuration of the indoor unit 1 shown in FIG. 1 is an example, and is not limited to this, and is not a wall-hanging type like the indoor unit 1 shown in FIG. An indoor unit embedded in a ceiling or the like may be used.
In addition, as shown in FIG. 1, it is assumed that the air blown from the outlet 5 is controlled in the vertical direction by the vertical wind direction flap 6 and is controlled in the horizontal direction by a flap 104 described later. However, the present invention is not limited to this, and the wind direction control may be performed in different directions.

(Configuration of wind direction control mechanism)
2 is a configuration diagram schematically showing a wind direction control mechanism of the indoor unit 1 of the air conditioner according to Embodiment 1 of the present invention, and FIG. 3 is connected to the arm 103 of the indoor unit 1. It is the block diagram which expanded and showed the flap 104 typically.
As shown in FIG. 2, the wind direction control mechanism of the indoor unit 1 of the air conditioner according to the present embodiment includes at least a stepping motor 100, a crank 101 connected to the rotating shaft of the stepping motor 100, and A link 102 that is rotatably connected to the other end of the crank 101, and an arm 103 that is connected to the other end of the link 102 and slides in the longitudinal direction by driving the link 102 as the stepping motor 100 rotates. The arm 103 includes a plurality of flaps 104 that are arranged in the longitudinal direction and serve as a wind direction guide, and a control unit 105 that is connected to the stepping motor 100 and performs rotation control thereof.
In addition, although the stepping motor is employ | adopted as a motor of a wind direction control mechanism, it is not limited to this, You may apply the motor in which positioning control, such as a servomotor, is possible.

  The flap 104 is rotatably connected to the arm 103 at the arm connecting portion 104b, and all the members connected to the same arm 103 by the slide drive of the arm 103 by the control portion 105 maintain the same direction. However, it is driven to rotate simultaneously around the flap rotation shaft 104a. Further, as shown in FIG. 3, the flap 104 has a flap rotation shaft 104 a formed on the outer side of the indoor unit 1.

  The crank 101, the link 102, the arm 103, and the arm connecting portion 104b correspond to the “transmission mechanism portion” of the present invention.

(Operation of wind direction control mechanism)
FIG. 4 is a diagram illustrating the direction of the flap 104 in the indoor unit 1 of the air conditioner according to Embodiment 1 of the present invention, and FIG. 5 illustrates the direction (1) to the direction (1) of the flap 104 in the indoor unit 1. It is a figure which shows the operation | movement of all the patterns in the case of performing positioning operation from each direction of 6) to another direction. Hereinafter, the operation of the wind direction control mechanism of the indoor unit 1 of the air conditioner according to the present embodiment will be described with reference to FIGS.

  The directions (1) to (6) shown in FIG. 4 indicate the longitudinal direction of the blades of the flap 104 that allows the flap 104 to be positioned as the arm 103 slides. Hereinafter, the longitudinal direction of the blades of the flap 104 is simply referred to as “the direction of the flap 104”. Among these, the direction (1) is a reference position determined by the original position returning operation performed when the air conditioner is turned on, and the number of steps of the stepping motor 100 is reset to 0 in this direction (1). . The direction (4) is a direction in which the direction of the flap 104 is substantially the same as the direction of the air blown out from the indoor unit 1 (hereinafter referred to as “front direction”). The flap 104 is positioned by the control unit 105 in any direction from the direction (2) to the direction (6).

  Although the directions (1) to (6) shown in FIG. 4 are displayed as directions positioned by the control unit 105, this is determined for convenience and is limited to this. Instead, the directions (1) to (6) may be set to directions different from the directions shown in FIG. 4 and are limited to the six directions (1) to (6). However, a different number of directions may be set as the positioning directions. Needless to say, the direction (1) is not limited to the original position.

  Here, as shown in FIG. 3, in a state where the flap 104 is rotated by a predetermined angle clockwise from the front direction, the arrow in FIG. 3 is caused by the wind blown from the inside of the indoor unit 1 toward the outside. The force is applied in the direction of movement in the rotational direction indicated by. That is, the flap 104 receives a force in a direction away from the front direction, that is, in a rotation direction in which the flap 104 spreads. On the contrary, when the flap 104 rotates counterclockwise from the front direction by a predetermined angle, the wind blown out from the indoor unit 1 causes the direction to move in the direction opposite to the rotation direction indicated by the arrow in FIG. You will receive power. That is, the flap 104 similarly receives a force in a direction away from the front direction, that is, a rotational direction in which the flap 104 spreads.

In FIG. 4, for example, when the flap 104 is positioned in the direction (5) from the position in the direction (2) by the control unit 105, the backlash of the gear mechanism of the stepping motor 100 is present, so that the direction ( There will be play in the same direction of rotation as positioned up to 5). Here, as described above with reference to FIG. 3, the flap 104 positioned in the direction (5) is rotated in the direction in which the flap 104 spreads by the wind blown from the indoor unit 1, that is, the direction in which the play is movable. To receive power. As a result, if the wind force is stronger than the sum of the holding torque of the stepping motor 100 and the friction torque of the transmission mechanism portion from the crank 101 to the arm connecting portion 104b via the link 102 and the arm 103, only the play amount is obtained. The flap 104 rotates and becomes a direction deviated from the normal positioning direction (5). In order to prevent this, the indoor unit 1 of the air conditioner according to the present embodiment performs the following backlash control operation. When the flap 104 is positioned from the position (2) to the direction (5) by the control unit 105, the control unit 105 first causes the flap 104 to reach the direction (5) and then the flap 104 at that time. Is temporarily stopped by rotating it by a predetermined angle. And the control part 105 positions from the position which stopped the flap 104 to the position of the direction (5) which is a regular target direction. As a result, play is generated in a direction opposite to the direction of play that occurs when the flap 104 is positioned directly in the direction (5) from the position in the direction (2). Therefore, since there is no play in the rotation direction in which the flap 104 spreads, it is possible to prevent the play from being rotated by the play due to the force of the wind blown from the air conditioner.
Although the control unit 105 does not stop the rotation of the flap 104 at that time after the flap 104 has reached the direction (5), it is temporarily stopped by rotating the flap 104 by a predetermined angle. Instead of this, after the flap 104 has reached the direction (5), the flap 104 may stop rotating at that point, and may be rotated by a predetermined angle from the position in the same direction and stopped.

  In FIG. 4, for example, when the flap 104 is positioned from the position (2) to the direction (3) by the control unit 105, as described above, the backlash included in the gear mechanism of the stepping motor 100 is provided. The presence of play means that there is play in the same direction as the direction positioned up to the direction (3). In this case, the flap 104 positioned in the direction (3) is in a direction opposite to the rotation direction in which the flap 104 spreads and the direction in which the play is movable, so that the force of the wind blown from the indoor unit 1 , It will not be rotated by play. Therefore, in this case, the control unit 105 does not need to perform the above-described backlash control operation, and may be positioned directly in the direction (3) from the position in the direction (2).

  Further, in FIG. 4, for example, when the flap 104 is positioned in the direction (4) (front direction) from the position (2) by the control unit 105, the flap 104 is blown from the indoor unit 1. Therefore, the control unit 105 may arbitrarily determine whether or not to perform the backlash control operation.

  FIG. 5 shows the positioning operation of all patterns including the five directions (2) to (6) and the original direction (1). It shows whether or not the backlash control operation is required for the positioning operation. FIG. 5 shows a case where the control unit 105 does not perform the backlash control operation when positioning the flap 104 from any direction to the front direction (4).

  When positioning the flap 104 in the right rotation direction, the control unit 105 moves back when positioning in the direction (4) (front direction) or the leftward direction (direction (2) and direction (3)) in front of the direction. It is not necessary to perform the rush control operation, but on the other hand, when positioning in the right direction (direction (5) and direction (6)) beyond the direction (4) (front direction), the backlash control operation is performed. And it is sufficient.

  On the other hand, when positioning the flap 104 in the counterclockwise rotation direction, the control unit 105 determines that the positioning is performed in the direction (4) (front direction) or in the rightward direction (only the direction (5) here). It is not necessary to perform the rush control operation, but on the other hand, when positioning in the left direction (direction (2) and direction (3)) beyond the direction (4) (front direction), the backlash control operation is performed. And it is sufficient.

FIG. 6 is a diagram illustrating an example of a bitmap for determining whether or not to perform the backlash control operation in the indoor unit 1 of the air conditioner according to Embodiment 1 of the present invention.
The control unit 105 stores a bitmap as shown in FIG. 6 in advance, and determines whether to perform the backlash control operation according to the bit corresponding to the direction of the positioning destination according to this bitmap. . As described above, the directions (1) to (6) shown in FIG. 4 are determined for the sake of convenience, and may be defined in different directions, corresponding to positioning in each defined direction. Create and store the bitmap you created. FIG. 6 shows some examples of bitmaps corresponding to each of the cases where the directions (1) to (6) are defined in various ways as shown in FIG. 4 in the present embodiment. When the directions (1) to (6) are defined as described above, the bitmap in the third column from the top among the bitmaps in FIG. 6 may be adopted.
In the example of the bitmap shown in FIG. 6, the backlash control operation is not performed when the flap 104 is positioned in the direction (4) (front direction), but may be performed. Is as described above.

(Effect of Embodiment 1)
By performing the backlash control operation during the flap positioning operation as in the above configuration and operation, the flap of the play mechanism of the stepping motor gear mechanism is generated by the force of the wind blown from the indoor unit of the air conditioner. Therefore, it is possible to obtain an indoor unit of an air conditioner having a wind direction control mechanism capable of performing accurate wind direction setting.

  In addition, the accurate wind direction setting by the backlash control operation of the indoor unit 1 of the air conditioner according to the present embodiment can be performed without changing the shape or the like of the outlet 5 or the operation mechanism of the indoor unit 1, that is, The operation mechanism can be realized only by changing the control method, and by this, it can be widely applied as a measure for preventing the malfunction of the air conditioner.

  In addition, it is not limited to setting the direction of the flap 104 to a specific positioning point as in the direction (1) to the direction (6), but may be positioned in any continuous direction. Good. In this case, the control unit 105 may determine whether or not to perform the backlash control operation in the positioning operation of the flap 104 by the same method as described above with reference to the front direction.

  Further, in the wind direction control mechanism described above, the flap 104 has the flap rotation shaft 104a formed closer to the outside of the indoor unit 1. However, as shown in FIG. It is good also as what is formed near the inner side. In this case, in a state in which the flap 104 is rotated clockwise or counterclockwise from the front direction by a predetermined angle, the indoor unit is moved in the direction opposite to the rotation direction in which the flap 104 spreads, that is, in the rotation direction in which the flap 104 faces the front direction. The force is received by the wind blown from 1. In this case, the control unit 105 performs all operations reverse to the backlash control operation in the positioning operation when the flap rotation shaft 104a described with reference to FIGS. 3 to 6 is formed closer to the outside of the indoor unit 1. do it. That is, when the backlash control operation is required for the positioning operation in the wind direction control mechanism shown in FIG. 3, the controller 105 does not perform the backlash control operation in the same positioning operation in the wind direction control mechanism shown in FIG. And it is sufficient. Further, in the case where the backlash control operation is not performed for the positioning operation in the wind direction control mechanism shown in FIG. 3, the control unit 105 performs the backlash control operation in the same positioning operation in the wind direction control mechanism shown in FIG. It should be. However, when the flap 104 is positioned in the direction (4) (front direction), whether or not the control unit 105 performs the backlash control operation is arbitrary as in the wind direction control mechanism shown in FIG. Good.

  DESCRIPTION OF SYMBOLS 1 Indoor unit, 2 suction inlet, 3 heat exchanger, 4 ventilation fan, 5 outlet, 6 up-and-down wind direction flap, 100 stepping motor, 101 crank, 102 link, 103 arm, 104 flap, 104a flap rotating shaft, 104b arm connection Part, 105 control part.

Claims (5)

A motor,
A flap that fluctuates the direction of the blowing air that is blown from the indoor unit;
A transmission mechanism for transmitting the rotation of the motor as the rotation of the flap;
A control unit that controls a flap direction that is a blade direction of the flap by performing rotation control of the motor;
With
The control unit eliminates the play when there is a play in a rotation direction in which the flap receives a force by the blowing air due to a backlash of the transmission mechanism unit during a positioning operation in a specific flap direction. Backlash control operation is performed ,
During positioning operation in which the flap is rotated and positioned to the right from the front from the position where the flap is positioned on the left side of the front, or positioning where the flap is rotated and positioned to the left of the front from the state where the flap is positioned on the right side of the front An air conditioner indoor unit that performs the backlash control operation during operation . As the backlash control operation, the control unit performs positioning from the flap direction in which the flap positioning operation is started to a direction obtained by adding a predetermined angle in the same direction as the positioning rotation direction in the flap direction as a positioning destination. Then, the flap is reversely rotated in the flap direction of the positioning destination. The indoor unit of an air conditioner according to claim 1, wherein The rotation axis of the flap is formed in a portion closer to the downstream side of the blowing air from the center of the flap in the longitudinal direction,
The indoor unit of an air conditioner according to claim 1 or 2, wherein the control unit eliminates the play that exists in a rotation direction in which the flap spreads as the backlash control operation. The rotation axis of the flap is formed in a portion closer to the upstream side of the blowing air from the center of the flap in the longitudinal direction,
3. The air conditioner according to claim 1, wherein the controller eliminates the play that exists in a rotation direction in which the flap direction is directed toward the front of the indoor unit as the backlash control operation. 4. Indoor unit. The controller is
A rotation direction in the positioning operation of the flap, and a bitmap associated with the flap direction in the positioning destination;
The air conditioner according to any one of claims 1 to 4, wherein whether or not to perform the backlash control operation is selected in the flap positioning operation based on the bitmap. Indoor unit.